/**
* @Title: WebsocketChatServer.java
* @Package com.cenntro.common.websocket
* @Description: 
* @author Administrator
* @date 2019年7月25日
* @version V1.0
*/
package com.cenntro.common.websocket;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

/**
 * Websocket 聊天服务器-服务端
 */
public class WebsocketServer {

    private int port;

    public WebsocketServer(int port) {
        this.port = port;
    }

    public void run() throws Exception {
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class) // (3)
                    .childHandler(new WebsocketServerInitializer())  // 处理初始化类
                    .option(ChannelOption.SO_BACKLOG, 128).childOption(ChannelOption.SO_KEEPALIVE, true); // 保持长连接
            System.out.println("WebsocketServer 启动了" + port);
            // 绑定端口，开始接收进来的连接
            ChannelFuture f = b.bind(port).sync(); // (7)
            // 等待服务器 socket 关闭 。
            // 在这个例子中，这不会发生，但你可以优雅地关闭你的服务器。
            f.channel().closeFuture().sync();
        } finally {
            workerGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
            System.out.println("WebsocketChatServer 关闭了");
        }
    }

    public static void main(String[] args) throws Exception {
        int port;
        if (args.length > 0) {
            port = Integer.parseInt(args[0]);
        } else {
            port = 8080;
        }
        new WebsocketServer(port).run();
    }
}
